Extrusion welding machine



FIG. 1 is a perspective view of an extrusion welding machine showing our design;

FIG. 2 is a left side elevational view thereof, the right side being a mirror image without handgrip;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken lines in the figures are environmental and form no part of the claimed design. 

CLAIM The ornamental design for an extrusion welding machine, as shown and described. 